This document provides an overview of Universal Design for Learning (UDL), including its history, principles, and applications. UDL was developed in the 1990s by researchers at the Center for Applied Special Technology to provide flexible learning environments and materials that accommodate learner variability. It is based on research showing that the brain processes information in diverse ways. UDL's three principles aim to support recognition networks, strategic networks, and affective networks by providing multiple means of representation, engagement, and expression. The document discusses how UDL aligns with educational standards and can help shift education away from a "one-size-fits-all" approach towards recognizing individual differences.